Improvement in steam-motors



T. B. FOGARTY.

Steam-Motor.

Patented Jan, 7,1879.

-z-mulmnllluum- NVPETERS, FHDTO-UTHEGRAPNER, WASHINGTON. D. C.

i the pressure of the steam.

UNITED STATES PATENT OFFICE.

THOMAS B. FOGARTY, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN STEAM-MOTORS.

Specification forming part of Le ttcrs Patent N0. 211,143, dated January7, 1879 application filed January 24, 1878.

To all whom it may concern.-

Be it known that I, THOMIAS B. FOGARTY, of Brooklyn, in the county ofKings and State of New York, have invented a new and useful Improvementin Steam and other Motors, of

which the following is aspecification:

The said invention relates chiefly to that class of small steam-motorsthat are suitable for running sewing-machines and other light work. Itconsists in combining with the boiler an air-chamber into which anexcessive pressure of steam will force all the water from the boiler, sothat no more steam can be made, and also in the application of the steamas an injector to revolve a suitable wheel, the water of condensationbeing returned to the boiler by any ordinary means.

The annexed drawing is a side elevation of a form of the apparatus,partly in section, in which the rotary motion is obtained through aninduced current of air. 7 it The boiler to is heated by the spirit-lampb,

and is connected at the bottom to the bottom of the air-tight tank orchamber 0, the capacity of which, relatively to the amount of watersupplied to the boiler, determines the limit of If the tank, forinstance, be of one thoiisand inches capacity, and five hundred cubicinches of water be supplied to the boiler, and then forced from theboiler into the tank 0, its thousand cubic inches of air will becompressed to five hundred cubic inches, with a corresponding i11-crease of its pressureto fifteen pounds per square inch. in the sameway, if seven hundred and fifty inches of water be forced from theboilerto the tank, the one thousand inches of its air will be compressedto two hundred and fifty inches, and its pressure will be increased tofour atmospheres, with variations due to temperature, or forty-fivepounds above the pressure of the atmosphere.

This combination of a boiler and an air-tank or chamber may be used inconnection with any kind of steam or gas engine or apparatus, and in allcases, as the pressure in the boiler equals that in the tank, the heightof the fluid in the latter indicates the pressure in both, and neither asafety-valve nor try-cocks will be required.

The steam-pipe d is used as an injector to carry a current of air byinduction through the pipe 0 to the buckets of the wheel f, from whichit displaces the water in which the Wheel is immersed, and thedisplacement of the water from the buckets of the air causes the wheelto revolve.

The pipe 0 is carried above the level of the water to preventitsdischarge when the motor is at rest. The overflow-pipe g connects withthe boiler-pump h, and receives all the water resulting from thecondensation of the steam, thus returning to the boiler the water whichleaves it in the form of steam.

In any form or arrangement of this motor, in which a jet of steam isused to produce the rotation of a wheel, little or no lubrication isrequired, there is no exhaust, the pressure in the boiler limits itself,and the feed from the condensation of the steam requires only theaddition of a small quantity of water to compensate for the loss byleakage and evaporation.

I claim as my invention- 1. In combination with a steam-boiler, theairchamber 0, connected as shown, and made of sufficient size to receiveall the water of the boiler, as and for the purpose set forth.

2. The combination of the boiler and the air-chamber, with a water-wheeland tank, substantially as described.

3. The tank, the steam-pipe d, and the overflow-pipe g, in combinationwith the boiler and the pump h, substantially as described.

THOS. B. FOGARTY.

Witnesses:

WALTER PELL, WM. KEMBLE HALL.

